Allyson May on thu 17 jun 04
Hey Randy,
I had a problem with "s" cracks however I have found a method which =
virtually eliminated them from my pieces. (I work in porcelain and its =
favorite thing to do is crack!) When throwing, after opening the clay =
and setting the bottom, I compress the bottom with my fingers running =
them from center to wall and back 9-10 times. Once the piece is trimmed =
I go back over the bottom with a rubber or wooden rib and compress =
inside the foot ring. If a piece does not have a trimmed foot I will =
still compress with the rib. Tah-Dah, no cracks! I think "s" cracks =
are a throwing issue instead of a drying issue so I wouldn't worry about =
that aspect as much as compression during throwing and trimming. Hope =
this helps! BTW, search the archives for more info.
Peace,
Allyson May
Stoney Creek Pottery
Bloomington, Indiana
Lee Love on thu 17 jun 04
Allyson May wrote:
> When throwing, after opening the clay and setting the bottom, I compress the bottom with my fingers running them from center to wall and back 9-10 times. Once the piece is trimmed I go back over the bottom with a rubber or wooden rib and compress inside the foot ring. If a piece does not have a trimmed foot I will still compress with the rib. Tah-Dah, no cracks!
>
Hasn't someone else here (or was it on another list?) mentioned,
when throwing the bottom for a large coiled pot, putting a layer of
paperclay down on the base? Gives it some added strength. When I
heard this, I thought it might be worth experimenting with.
--
Lee in Mashiko, Japan http://mashiko.org
http://journals.fotki.com/togeika/Mashiko/ Commentary On Pottery
Joe Sanger on thu 17 jun 04
I could not agree with you moore ever since I started
doing what you do I havve had no problems with cracks
Joe
--- Allyson May wrote:
> Hey Randy,
> I had a problem with "s" cracks however I have found
> a method which virtually eliminated them from my
> pieces. (I work in porcelain and its favorite thing
> to do is crack!) When throwing, after opening the
> clay and setting the bottom, I compress the bottom
> with my fingers running them from center to wall and
> back 9-10 times. Once the piece is trimmed I go
> back over the bottom with a rubber or wooden rib and
> compress inside the foot ring. If a piece does not
> have a trimmed foot I will still compress with the
> rib. Tah-Dah, no cracks! I think "s" cracks are a
> throwing issue instead of a drying issue so I
> wouldn't worry about that aspect as much as
> compression during throwing and trimming. Hope this
> helps! BTW, search the archives for more info.
> Peace,
> Allyson May
> Stoney Creek Pottery
> Bloomington, Indiana
>
>
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